<template>
  <div class="todo-footer">
    <p v-if="this.todoList.length>0?'':'true'">暂无内容</p>
    
    <label>
      <input type="checkbox" v-model="checkAll"  />
    </label>
    <span> 
      <span>已完成{{isLoad}}</span> / 全部 {{todoList.length}} 
      </span>
    <button class="btn btn-danger" @click="removeDone" >清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "Footer",
  props:["todoList","ischeck","removeDone"],
  data() {
    return {
    }
  },
  computed:{
    isLoad(){
      return this.todoList.filter(item=>item.done===true).length
    },
    checkAll:{
      get(){
        return this.isLoad === this.todoList.length && this.todoList.length;
      },
      set(newVal){
        this.ischeck(newVal)
      }
    }
  },
};
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
